[stubs] Fixing loads/stores from arrays by int32 offsets/indices. Step 2.

src/code-stub-assembler.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 215 matching lines @@
   compiler::Node* LoadMapDescriptors(compiler::Node* map);
   // Load the prototype of a map.
   compiler::Node* LoadMapPrototype(compiler::Node* map);
   // Load the instance size of a Map.
   compiler::Node* LoadMapInstanceSize(compiler::Node* map);
   // Load the inobject properties count of a Map (valid only for JSObjects).
   compiler::Node* LoadMapInobjectProperties(compiler::Node* map);
   // Load the constructor of a Map (equivalent to Map::GetConstructor()).
   compiler::Node* LoadMapConstructor(compiler::Node* map);
 
-  // Load the hash field of a name.
+  // Load the hash field of a name as an uint32 value.
   compiler::Node* LoadNameHashField(compiler::Node* name);
-  // Load the hash value of a name. If {if_hash_not_computed} label
-  // is specified then it also checks if hash is actually computed.
+  // Load the hash value of a name as an uint32 value.
+  // If {if_hash_not_computed} label is specified then it also checks if
+  // hash is actually computed.
   compiler::Node* LoadNameHash(compiler::Node* name,
                                Label* if_hash_not_computed = nullptr);
 
   // Load length field of a String object.
   compiler::Node* LoadStringLength(compiler::Node* object);
   // Load value field of a JSValue object.
   compiler::Node* LoadJSValueValue(compiler::Node* object);
   // Load value field of a WeakCell object.
   compiler::Node* LoadWeakCellValue(compiler::Node* weak_cell,
                                     Label* if_cleared = nullptr);
@@ skipping 123 matching lines @@
   compiler::Node* StringCharCodeAt(compiler::Node* string,
                                    compiler::Node* smi_index);
   // Return the single character string with only {code}.
   compiler::Node* StringFromCharCode(compiler::Node* code);
 
   // Type conversion helpers.
   // Convert a String to a Number.
   compiler::Node* StringToNumber(compiler::Node* context,
                                  compiler::Node* input);
 
-  // Returns a node that is true if the given bit is set in |word32|.
+  // Returns a node that contains a decoded (unsigned!) value of a bit
+  // field |T| in |word32|. Returns result as an uint32 node.
   template <typename T>
   compiler::Node* BitFieldDecode(compiler::Node* word32) {
     return BitFieldDecode(word32, T::kShift, T::kMask);
   }
 
+  // Returns a node that contains a decoded (unsigned!) value of a bit
+  // field |T| in |word32|. Returns result as a word-size node.
+  template <typename T>
+  compiler::Node* BitFieldDecodeWord(compiler::Node* word32) {
+    return ChangeUint32ToWord(BitFieldDecode<T>(word32));
+  }
+
+  // Decodes an unsigned (!) value from |word32| to an uint32 node.
   compiler::Node* BitFieldDecode(compiler::Node* word32, uint32_t shift,
                                  uint32_t mask);
 
   void SetCounter(StatsCounter* counter, int value);
   void IncrementCounter(StatsCounter* counter, int delta);
   void DecrementCounter(StatsCounter* counter, int delta);
 
   // Generates "if (false) goto label" code. Useful for marking a label as
   // "live" to avoid assertion failures during graph building. In the resulting
   // code this check will be eliminated.
@@ skipping 235 matching lines @@
   compiler::Node* SmiShiftBitsConstant();
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_